mirror of
https://codeberg.org/forgejo/forgejo
synced 2024-11-24 18:56:11 +01:00
753 lines
24 KiB
Go
753 lines
24 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package user
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import (
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"encoding/base64"
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"fmt"
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"html"
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"net/http"
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"net/url"
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"strings"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/models/login"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/context"
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"code.gitea.io/gitea/modules/json"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/timeutil"
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"code.gitea.io/gitea/modules/web"
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"code.gitea.io/gitea/services/auth"
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"code.gitea.io/gitea/services/auth/source/oauth2"
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"code.gitea.io/gitea/services/forms"
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"gitea.com/go-chi/binding"
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"github.com/golang-jwt/jwt"
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)
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const (
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tplGrantAccess base.TplName = "user/auth/grant"
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tplGrantError base.TplName = "user/auth/grant_error"
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)
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// TODO move error and responses to SDK or models
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// AuthorizeErrorCode represents an error code specified in RFC 6749
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type AuthorizeErrorCode string
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const (
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// ErrorCodeInvalidRequest represents the according error in RFC 6749
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ErrorCodeInvalidRequest AuthorizeErrorCode = "invalid_request"
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// ErrorCodeUnauthorizedClient represents the according error in RFC 6749
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ErrorCodeUnauthorizedClient AuthorizeErrorCode = "unauthorized_client"
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// ErrorCodeAccessDenied represents the according error in RFC 6749
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ErrorCodeAccessDenied AuthorizeErrorCode = "access_denied"
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// ErrorCodeUnsupportedResponseType represents the according error in RFC 6749
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ErrorCodeUnsupportedResponseType AuthorizeErrorCode = "unsupported_response_type"
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// ErrorCodeInvalidScope represents the according error in RFC 6749
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ErrorCodeInvalidScope AuthorizeErrorCode = "invalid_scope"
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// ErrorCodeServerError represents the according error in RFC 6749
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ErrorCodeServerError AuthorizeErrorCode = "server_error"
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// ErrorCodeTemporaryUnavailable represents the according error in RFC 6749
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ErrorCodeTemporaryUnavailable AuthorizeErrorCode = "temporarily_unavailable"
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)
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// AuthorizeError represents an error type specified in RFC 6749
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type AuthorizeError struct {
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ErrorCode AuthorizeErrorCode `json:"error" form:"error"`
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ErrorDescription string
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State string
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}
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// Error returns the error message
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func (err AuthorizeError) Error() string {
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return fmt.Sprintf("%s: %s", err.ErrorCode, err.ErrorDescription)
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}
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// AccessTokenErrorCode represents an error code specified in RFC 6749
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type AccessTokenErrorCode string
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const (
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// AccessTokenErrorCodeInvalidRequest represents an error code specified in RFC 6749
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AccessTokenErrorCodeInvalidRequest AccessTokenErrorCode = "invalid_request"
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// AccessTokenErrorCodeInvalidClient represents an error code specified in RFC 6749
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AccessTokenErrorCodeInvalidClient = "invalid_client"
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// AccessTokenErrorCodeInvalidGrant represents an error code specified in RFC 6749
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AccessTokenErrorCodeInvalidGrant = "invalid_grant"
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// AccessTokenErrorCodeUnauthorizedClient represents an error code specified in RFC 6749
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AccessTokenErrorCodeUnauthorizedClient = "unauthorized_client"
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// AccessTokenErrorCodeUnsupportedGrantType represents an error code specified in RFC 6749
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AccessTokenErrorCodeUnsupportedGrantType = "unsupported_grant_type"
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// AccessTokenErrorCodeInvalidScope represents an error code specified in RFC 6749
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AccessTokenErrorCodeInvalidScope = "invalid_scope"
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)
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// AccessTokenError represents an error response specified in RFC 6749
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type AccessTokenError struct {
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ErrorCode AccessTokenErrorCode `json:"error" form:"error"`
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ErrorDescription string `json:"error_description"`
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}
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// Error returns the error message
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func (err AccessTokenError) Error() string {
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return fmt.Sprintf("%s: %s", err.ErrorCode, err.ErrorDescription)
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}
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// TokenType specifies the kind of token
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type TokenType string
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const (
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// TokenTypeBearer represents a token type specified in RFC 6749
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TokenTypeBearer TokenType = "bearer"
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// TokenTypeMAC represents a token type specified in RFC 6749
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TokenTypeMAC = "mac"
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)
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// AccessTokenResponse represents a successful access token response
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type AccessTokenResponse struct {
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AccessToken string `json:"access_token"`
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TokenType TokenType `json:"token_type"`
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ExpiresIn int64 `json:"expires_in"`
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RefreshToken string `json:"refresh_token"`
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IDToken string `json:"id_token,omitempty"`
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}
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func newAccessTokenResponse(grant *login.OAuth2Grant, serverKey, clientKey oauth2.JWTSigningKey) (*AccessTokenResponse, *AccessTokenError) {
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if setting.OAuth2.InvalidateRefreshTokens {
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if err := grant.IncreaseCounter(); err != nil {
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return nil, &AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidGrant,
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ErrorDescription: "cannot increase the grant counter",
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}
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}
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}
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// generate access token to access the API
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expirationDate := timeutil.TimeStampNow().Add(setting.OAuth2.AccessTokenExpirationTime)
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accessToken := &oauth2.Token{
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GrantID: grant.ID,
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Type: oauth2.TypeAccessToken,
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StandardClaims: jwt.StandardClaims{
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ExpiresAt: expirationDate.AsTime().Unix(),
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},
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}
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signedAccessToken, err := accessToken.SignToken(serverKey)
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if err != nil {
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return nil, &AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidRequest,
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ErrorDescription: "cannot sign token",
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}
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}
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// generate refresh token to request an access token after it expired later
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refreshExpirationDate := timeutil.TimeStampNow().Add(setting.OAuth2.RefreshTokenExpirationTime * 60 * 60).AsTime().Unix()
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refreshToken := &oauth2.Token{
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GrantID: grant.ID,
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Counter: grant.Counter,
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Type: oauth2.TypeRefreshToken,
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StandardClaims: jwt.StandardClaims{
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ExpiresAt: refreshExpirationDate,
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},
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}
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signedRefreshToken, err := refreshToken.SignToken(serverKey)
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if err != nil {
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return nil, &AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidRequest,
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ErrorDescription: "cannot sign token",
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}
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}
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// generate OpenID Connect id_token
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signedIDToken := ""
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if grant.ScopeContains("openid") {
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app, err := login.GetOAuth2ApplicationByID(grant.ApplicationID)
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if err != nil {
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return nil, &AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidRequest,
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ErrorDescription: "cannot find application",
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}
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}
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user, err := user_model.GetUserByID(grant.UserID)
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if err != nil {
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if user_model.IsErrUserNotExist(err) {
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return nil, &AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidRequest,
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ErrorDescription: "cannot find user",
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}
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}
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log.Error("Error loading user: %v", err)
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return nil, &AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidRequest,
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ErrorDescription: "server error",
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}
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}
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idToken := &oauth2.OIDCToken{
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StandardClaims: jwt.StandardClaims{
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ExpiresAt: expirationDate.AsTime().Unix(),
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Issuer: setting.AppURL,
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Audience: app.ClientID,
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Subject: fmt.Sprint(grant.UserID),
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},
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Nonce: grant.Nonce,
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}
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if grant.ScopeContains("profile") {
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idToken.Name = user.FullName
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idToken.PreferredUsername = user.Name
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idToken.Profile = user.HTMLURL()
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idToken.Picture = user.AvatarLink()
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idToken.Website = user.Website
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idToken.Locale = user.Language
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idToken.UpdatedAt = user.UpdatedUnix
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}
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if grant.ScopeContains("email") {
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idToken.Email = user.Email
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idToken.EmailVerified = user.IsActive
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}
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if grant.ScopeContains("groups") {
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groups, err := getOAuthGroupsForUser(user)
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if err != nil {
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log.Error("Error getting groups: %v", err)
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return nil, &AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidRequest,
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ErrorDescription: "server error",
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}
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}
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idToken.Groups = groups
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}
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signedIDToken, err = idToken.SignToken(clientKey)
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if err != nil {
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return nil, &AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidRequest,
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ErrorDescription: "cannot sign token",
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}
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}
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}
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return &AccessTokenResponse{
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AccessToken: signedAccessToken,
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TokenType: TokenTypeBearer,
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ExpiresIn: setting.OAuth2.AccessTokenExpirationTime,
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RefreshToken: signedRefreshToken,
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IDToken: signedIDToken,
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}, nil
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}
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type userInfoResponse struct {
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Sub string `json:"sub"`
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Name string `json:"name"`
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Username string `json:"preferred_username"`
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Email string `json:"email"`
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Picture string `json:"picture"`
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Groups []string `json:"groups"`
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}
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// InfoOAuth manages request for userinfo endpoint
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func InfoOAuth(ctx *context.Context) {
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if ctx.User == nil || ctx.Data["AuthedMethod"] != (&auth.OAuth2{}).Name() {
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ctx.Resp.Header().Set("WWW-Authenticate", `Bearer realm=""`)
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ctx.PlainText(http.StatusUnauthorized, "no valid authorization")
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return
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}
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response := &userInfoResponse{
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Sub: fmt.Sprint(ctx.User.ID),
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Name: ctx.User.FullName,
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Username: ctx.User.Name,
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Email: ctx.User.Email,
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Picture: ctx.User.AvatarLink(),
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}
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groups, err := getOAuthGroupsForUser(ctx.User)
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if err != nil {
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ctx.ServerError("Oauth groups for user", err)
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return
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}
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response.Groups = groups
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ctx.JSON(http.StatusOK, response)
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}
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// returns a list of "org" and "org:team" strings,
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// that the given user is a part of.
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func getOAuthGroupsForUser(user *user_model.User) ([]string, error) {
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orgs, err := models.GetUserOrgsList(user)
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if err != nil {
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return nil, fmt.Errorf("GetUserOrgList: %v", err)
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}
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var groups []string
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for _, org := range orgs {
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groups = append(groups, org.Name)
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teams, err := org.LoadTeams()
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if err != nil {
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return nil, fmt.Errorf("LoadTeams: %v", err)
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}
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for _, team := range teams {
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if team.IsMember(user.ID) {
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groups = append(groups, org.Name+":"+team.LowerName)
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}
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}
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}
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return groups, nil
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}
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// IntrospectOAuth introspects an oauth token
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func IntrospectOAuth(ctx *context.Context) {
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if ctx.User == nil {
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ctx.Resp.Header().Set("WWW-Authenticate", `Bearer realm=""`)
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ctx.PlainText(http.StatusUnauthorized, "no valid authorization")
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return
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}
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var response struct {
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Active bool `json:"active"`
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Scope string `json:"scope,omitempty"`
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jwt.StandardClaims
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}
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form := web.GetForm(ctx).(*forms.IntrospectTokenForm)
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token, err := oauth2.ParseToken(form.Token, oauth2.DefaultSigningKey)
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if err == nil {
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if token.Valid() == nil {
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grant, err := login.GetOAuth2GrantByID(token.GrantID)
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if err == nil && grant != nil {
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app, err := login.GetOAuth2ApplicationByID(grant.ApplicationID)
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if err == nil && app != nil {
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response.Active = true
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response.Scope = grant.Scope
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response.Issuer = setting.AppURL
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response.Audience = app.ClientID
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response.Subject = fmt.Sprint(grant.UserID)
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}
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}
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}
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}
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ctx.JSON(http.StatusOK, response)
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}
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// AuthorizeOAuth manages authorize requests
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func AuthorizeOAuth(ctx *context.Context) {
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form := web.GetForm(ctx).(*forms.AuthorizationForm)
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errs := binding.Errors{}
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errs = form.Validate(ctx.Req, errs)
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if len(errs) > 0 {
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errstring := ""
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for _, e := range errs {
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errstring += e.Error() + "\n"
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}
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ctx.ServerError("AuthorizeOAuth: Validate: ", fmt.Errorf("errors occurred during validation: %s", errstring))
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return
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}
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app, err := login.GetOAuth2ApplicationByClientID(form.ClientID)
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if err != nil {
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if login.IsErrOauthClientIDInvalid(err) {
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handleAuthorizeError(ctx, AuthorizeError{
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ErrorCode: ErrorCodeUnauthorizedClient,
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ErrorDescription: "Client ID not registered",
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State: form.State,
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}, "")
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return
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}
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ctx.ServerError("GetOAuth2ApplicationByClientID", err)
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return
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}
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user, err := user_model.GetUserByID(app.UID)
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if err != nil {
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ctx.ServerError("GetUserByID", err)
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return
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}
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if !app.ContainsRedirectURI(form.RedirectURI) {
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handleAuthorizeError(ctx, AuthorizeError{
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ErrorCode: ErrorCodeInvalidRequest,
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ErrorDescription: "Unregistered Redirect URI",
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State: form.State,
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}, "")
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return
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}
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if form.ResponseType != "code" {
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handleAuthorizeError(ctx, AuthorizeError{
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ErrorCode: ErrorCodeUnsupportedResponseType,
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ErrorDescription: "Only code response type is supported.",
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State: form.State,
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}, form.RedirectURI)
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return
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}
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// pkce support
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switch form.CodeChallengeMethod {
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case "S256":
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case "plain":
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if err := ctx.Session.Set("CodeChallengeMethod", form.CodeChallengeMethod); err != nil {
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handleAuthorizeError(ctx, AuthorizeError{
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ErrorCode: ErrorCodeServerError,
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ErrorDescription: "cannot set code challenge method",
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State: form.State,
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}, form.RedirectURI)
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return
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}
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if err := ctx.Session.Set("CodeChallengeMethod", form.CodeChallenge); err != nil {
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handleAuthorizeError(ctx, AuthorizeError{
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ErrorCode: ErrorCodeServerError,
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ErrorDescription: "cannot set code challenge",
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State: form.State,
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}, form.RedirectURI)
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return
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}
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// Here we're just going to try to release the session early
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if err := ctx.Session.Release(); err != nil {
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// we'll tolerate errors here as they *should* get saved elsewhere
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log.Error("Unable to save changes to the session: %v", err)
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}
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case "":
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break
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default:
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handleAuthorizeError(ctx, AuthorizeError{
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ErrorCode: ErrorCodeInvalidRequest,
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ErrorDescription: "unsupported code challenge method",
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State: form.State,
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}, form.RedirectURI)
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return
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}
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grant, err := app.GetGrantByUserID(ctx.User.ID)
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if err != nil {
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handleServerError(ctx, form.State, form.RedirectURI)
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return
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}
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// Redirect if user already granted access
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if grant != nil {
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code, err := grant.GenerateNewAuthorizationCode(form.RedirectURI, form.CodeChallenge, form.CodeChallengeMethod)
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if err != nil {
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handleServerError(ctx, form.State, form.RedirectURI)
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return
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}
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redirect, err := code.GenerateRedirectURI(form.State)
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if err != nil {
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handleServerError(ctx, form.State, form.RedirectURI)
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return
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}
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// Update nonce to reflect the new session
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if len(form.Nonce) > 0 {
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err := grant.SetNonce(form.Nonce)
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if err != nil {
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log.Error("Unable to update nonce: %v", err)
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}
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}
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ctx.Redirect(redirect.String(), 302)
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return
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}
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// show authorize page to grant access
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ctx.Data["Application"] = app
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ctx.Data["RedirectURI"] = form.RedirectURI
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ctx.Data["State"] = form.State
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ctx.Data["Scope"] = form.Scope
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ctx.Data["Nonce"] = form.Nonce
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ctx.Data["ApplicationUserLink"] = "<a href=\"" + html.EscapeString(user.HTMLURL()) + "\">@" + html.EscapeString(user.Name) + "</a>"
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ctx.Data["ApplicationRedirectDomainHTML"] = "<strong>" + html.EscapeString(form.RedirectURI) + "</strong>"
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// TODO document SESSION <=> FORM
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err = ctx.Session.Set("client_id", app.ClientID)
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if err != nil {
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handleServerError(ctx, form.State, form.RedirectURI)
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log.Error(err.Error())
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return
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}
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err = ctx.Session.Set("redirect_uri", form.RedirectURI)
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if err != nil {
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handleServerError(ctx, form.State, form.RedirectURI)
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log.Error(err.Error())
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return
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}
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err = ctx.Session.Set("state", form.State)
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if err != nil {
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handleServerError(ctx, form.State, form.RedirectURI)
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log.Error(err.Error())
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return
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}
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// Here we're just going to try to release the session early
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if err := ctx.Session.Release(); err != nil {
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// we'll tolerate errors here as they *should* get saved elsewhere
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log.Error("Unable to save changes to the session: %v", err)
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}
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ctx.HTML(http.StatusOK, tplGrantAccess)
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}
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// GrantApplicationOAuth manages the post request submitted when a user grants access to an application
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func GrantApplicationOAuth(ctx *context.Context) {
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form := web.GetForm(ctx).(*forms.GrantApplicationForm)
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if ctx.Session.Get("client_id") != form.ClientID || ctx.Session.Get("state") != form.State ||
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ctx.Session.Get("redirect_uri") != form.RedirectURI {
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ctx.Error(http.StatusBadRequest)
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return
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}
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app, err := login.GetOAuth2ApplicationByClientID(form.ClientID)
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if err != nil {
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ctx.ServerError("GetOAuth2ApplicationByClientID", err)
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return
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}
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grant, err := app.CreateGrant(ctx.User.ID, form.Scope)
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if err != nil {
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handleAuthorizeError(ctx, AuthorizeError{
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State: form.State,
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ErrorDescription: "cannot create grant for user",
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ErrorCode: ErrorCodeServerError,
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}, form.RedirectURI)
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return
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}
|
|
if len(form.Nonce) > 0 {
|
|
err := grant.SetNonce(form.Nonce)
|
|
if err != nil {
|
|
log.Error("Unable to update nonce: %v", err)
|
|
}
|
|
}
|
|
|
|
var codeChallenge, codeChallengeMethod string
|
|
codeChallenge, _ = ctx.Session.Get("CodeChallenge").(string)
|
|
codeChallengeMethod, _ = ctx.Session.Get("CodeChallengeMethod").(string)
|
|
|
|
code, err := grant.GenerateNewAuthorizationCode(form.RedirectURI, codeChallenge, codeChallengeMethod)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
return
|
|
}
|
|
redirect, err := code.GenerateRedirectURI(form.State)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
return
|
|
}
|
|
ctx.Redirect(redirect.String(), 302)
|
|
}
|
|
|
|
// OIDCWellKnown generates JSON so OIDC clients know Gitea's capabilities
|
|
func OIDCWellKnown(ctx *context.Context) {
|
|
t := ctx.Render.TemplateLookup("user/auth/oidc_wellknown")
|
|
ctx.Resp.Header().Set("Content-Type", "application/json")
|
|
ctx.Data["SigningKey"] = oauth2.DefaultSigningKey
|
|
if err := t.Execute(ctx.Resp, ctx.Data); err != nil {
|
|
log.Error("%v", err)
|
|
ctx.Error(http.StatusInternalServerError)
|
|
}
|
|
}
|
|
|
|
// OIDCKeys generates the JSON Web Key Set
|
|
func OIDCKeys(ctx *context.Context) {
|
|
jwk, err := oauth2.DefaultSigningKey.ToJWK()
|
|
if err != nil {
|
|
log.Error("Error converting signing key to JWK: %v", err)
|
|
ctx.Error(http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
jwk["use"] = "sig"
|
|
|
|
jwks := map[string][]map[string]string{
|
|
"keys": {
|
|
jwk,
|
|
},
|
|
}
|
|
|
|
ctx.Resp.Header().Set("Content-Type", "application/json")
|
|
enc := json.NewEncoder(ctx.Resp)
|
|
if err := enc.Encode(jwks); err != nil {
|
|
log.Error("Failed to encode representation as json. Error: %v", err)
|
|
}
|
|
}
|
|
|
|
// AccessTokenOAuth manages all access token requests by the client
|
|
func AccessTokenOAuth(ctx *context.Context) {
|
|
form := *web.GetForm(ctx).(*forms.AccessTokenForm)
|
|
if form.ClientID == "" {
|
|
authHeader := ctx.Req.Header.Get("Authorization")
|
|
authContent := strings.SplitN(authHeader, " ", 2)
|
|
if len(authContent) == 2 && authContent[0] == "Basic" {
|
|
payload, err := base64.StdEncoding.DecodeString(authContent[1])
|
|
if err != nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidRequest,
|
|
ErrorDescription: "cannot parse basic auth header",
|
|
})
|
|
return
|
|
}
|
|
pair := strings.SplitN(string(payload), ":", 2)
|
|
if len(pair) != 2 {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidRequest,
|
|
ErrorDescription: "cannot parse basic auth header",
|
|
})
|
|
return
|
|
}
|
|
form.ClientID = pair[0]
|
|
form.ClientSecret = pair[1]
|
|
}
|
|
}
|
|
|
|
serverKey := oauth2.DefaultSigningKey
|
|
clientKey := serverKey
|
|
if serverKey.IsSymmetric() {
|
|
var err error
|
|
clientKey, err = oauth2.CreateJWTSigningKey(serverKey.SigningMethod().Alg(), []byte(form.ClientSecret))
|
|
if err != nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidRequest,
|
|
ErrorDescription: "Error creating signing key",
|
|
})
|
|
return
|
|
}
|
|
}
|
|
|
|
switch form.GrantType {
|
|
case "refresh_token":
|
|
handleRefreshToken(ctx, form, serverKey, clientKey)
|
|
case "authorization_code":
|
|
handleAuthorizationCode(ctx, form, serverKey, clientKey)
|
|
default:
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnsupportedGrantType,
|
|
ErrorDescription: "Only refresh_token or authorization_code grant type is supported",
|
|
})
|
|
}
|
|
}
|
|
|
|
func handleRefreshToken(ctx *context.Context, form forms.AccessTokenForm, serverKey, clientKey oauth2.JWTSigningKey) {
|
|
token, err := oauth2.ParseToken(form.RefreshToken, serverKey)
|
|
if err != nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
// get grant before increasing counter
|
|
grant, err := login.GetOAuth2GrantByID(token.GrantID)
|
|
if err != nil || grant == nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidGrant,
|
|
ErrorDescription: "grant does not exist",
|
|
})
|
|
return
|
|
}
|
|
|
|
// check if token got already used
|
|
if setting.OAuth2.InvalidateRefreshTokens && (grant.Counter != token.Counter || token.Counter == 0) {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "token was already used",
|
|
})
|
|
log.Warn("A client tried to use a refresh token for grant_id = %d was used twice!", grant.ID)
|
|
return
|
|
}
|
|
accessToken, tokenErr := newAccessTokenResponse(grant, serverKey, clientKey)
|
|
if tokenErr != nil {
|
|
handleAccessTokenError(ctx, *tokenErr)
|
|
return
|
|
}
|
|
ctx.JSON(http.StatusOK, accessToken)
|
|
}
|
|
|
|
func handleAuthorizationCode(ctx *context.Context, form forms.AccessTokenForm, serverKey, clientKey oauth2.JWTSigningKey) {
|
|
app, err := login.GetOAuth2ApplicationByClientID(form.ClientID)
|
|
if err != nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidClient,
|
|
ErrorDescription: fmt.Sprintf("cannot load client with client id: '%s'", form.ClientID),
|
|
})
|
|
return
|
|
}
|
|
if !app.ValidateClientSecret([]byte(form.ClientSecret)) {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
if form.RedirectURI != "" && !app.ContainsRedirectURI(form.RedirectURI) {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
authorizationCode, err := login.GetOAuth2AuthorizationByCode(form.Code)
|
|
if err != nil || authorizationCode == nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
// check if code verifier authorizes the client, PKCE support
|
|
if !authorizationCode.ValidateCodeChallenge(form.CodeVerifier) {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
// check if granted for this application
|
|
if authorizationCode.Grant.ApplicationID != app.ID {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidGrant,
|
|
ErrorDescription: "invalid grant",
|
|
})
|
|
return
|
|
}
|
|
// remove token from database to deny duplicate usage
|
|
if err := authorizationCode.Invalidate(); err != nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidRequest,
|
|
ErrorDescription: "cannot proceed your request",
|
|
})
|
|
}
|
|
resp, tokenErr := newAccessTokenResponse(authorizationCode.Grant, serverKey, clientKey)
|
|
if tokenErr != nil {
|
|
handleAccessTokenError(ctx, *tokenErr)
|
|
return
|
|
}
|
|
// send successful response
|
|
ctx.JSON(http.StatusOK, resp)
|
|
}
|
|
|
|
func handleAccessTokenError(ctx *context.Context, acErr AccessTokenError) {
|
|
ctx.JSON(http.StatusBadRequest, acErr)
|
|
}
|
|
|
|
func handleServerError(ctx *context.Context, state string, redirectURI string) {
|
|
handleAuthorizeError(ctx, AuthorizeError{
|
|
ErrorCode: ErrorCodeServerError,
|
|
ErrorDescription: "A server error occurred",
|
|
State: state,
|
|
}, redirectURI)
|
|
}
|
|
|
|
func handleAuthorizeError(ctx *context.Context, authErr AuthorizeError, redirectURI string) {
|
|
if redirectURI == "" {
|
|
log.Warn("Authorization failed: %v", authErr.ErrorDescription)
|
|
ctx.Data["Error"] = authErr
|
|
ctx.HTML(400, tplGrantError)
|
|
return
|
|
}
|
|
redirect, err := url.Parse(redirectURI)
|
|
if err != nil {
|
|
ctx.ServerError("url.Parse", err)
|
|
return
|
|
}
|
|
q := redirect.Query()
|
|
q.Set("error", string(authErr.ErrorCode))
|
|
q.Set("error_description", authErr.ErrorDescription)
|
|
q.Set("state", authErr.State)
|
|
redirect.RawQuery = q.Encode()
|
|
ctx.Redirect(redirect.String(), 302)
|
|
}
|